MAX218 Maxim, MAX218 Datasheet
MAX218
Manufacturer Part Number
MAX218
Description
1.8V to 4.25V-Powered / True RS-232 Dual Transceiver
Manufacturer
Maxim
Datasheet
1.MAX218.pdf
(8 pages)
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The MAX218 RS-232 transceiver is intended for battery-
powered EIA/TIA-232E and V.28/V.24 communications
interfaces that need two drivers and two receivers with
minimum power consumption. It provides a wide +1.8V
to +4.25V operating voltage range while maintaining
true RS-232 and EIA/TIA-562 voltage levels. The
MAX218 runs from two alkaline, NiCd, or NiMH cells
without any form of voltage regulator.
A shutdown mode reduces current consumption to
1µA, extending battery life in portable systems. While
shut down, all receivers can remain active or can be
disabled under logic control, permitting a system incor-
porating the CMOS MAX218 to monitor external
devices while in low-power shutdown mode.
A guaranteed 120kbps data rate provides compatibility
with popular software for communicating with personal
computers. Three-state drivers are provided on all
receiver outputs so that multiple receivers, generally of
different interface standards, can be wire-ORed at the
UART. The MAX218 is available in 20-pin DIP, SO, and
SSOP packages.
________________________Applications
19-0246; Rev 1; 7/95
Call toll free 1-800-998-8800 for free samples or literature.
__________Typical Operating Circuit
_______________General Description
Battery-Powered Equipment
Computers
Printers
Peripherals
Instruments
Modems
ON/OFF
ENABLE
4.25V
1.8V
TO
10
________________________________________________________________ Maxim Integrated Products
3
7
8
9
6
SHDN
V
T1IN
T2IN
R1OUT
R2OUT
CC
EN
1
LX
MAX218
4
T1
T2
R1
R2
19
GND
V+
5, 17, 20
T1OUT
T2OUT
R1IN
R2IN
C1+
C1-
V-
18
16
13
12
11
15
14
True RS-232 Dual Transceiver
1.8V to 4.25V-Powered,
____________________________Features
BETTER THAN BIPOLAR!
*Contact factory for dice specifications.
__________________Pin Configuration
______________Ordering Information
MAX218CPP
MAX218CWP
MAX218CAP
MAX218C/D
MAX218EPP
MAX218EWP
MAX218EAP
Operates Directly from Two Alkaline, NiCd,
or NiMH Cells
+1.8V to +4.25V Supply Voltage Range
120kbps Data Rate
Low-Cost Surface-Mount Components
Meets EIA/TIA-232E Specifications
1µA Low-Power Shutdown Mode
Both Receivers Active During Low-Power Shutdown
Three-State Receiver Outputs
Flow-Through Pinout
On-Board DC-DC Converters
20-Pin SSOP, Wide SO, or DIP Packages
TOP VIEW
PART
R1OUT
R2OUT
SHDN
GND
T1IN
T2IN
N.C.
V
LX
EN
CC
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
10
1
2
3
4
5
6
7
9
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
8
DIP/SO/SSOP
MAX218
20
19
18
17
16
15
14
13
12
11
20 Plastic DIP
20 Wide SO
20 SSOP
Dice*
20 Plastic DIP
20 Wide SO
20 SSOP
PIN-PACKAGE
GND
V+
C1+
GND
C1-
V-
T1OUT
T2OUT
R1IN
R2IN
1
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